Americans are voting today in midterm elections that will determine control of Congress and shape the final two years of President Donald Trump’s second term. But beneath the battle for the House and Senate lies a more immediate question: What is actually driving voters to the polls?

It is actually all connected.

The war with Iran has collided with concerns over energy prices. Tariffs have become part of the debate over household costs. Immigration remains one of the sharpest dividing lines between Republicans and Democrats. Health care costs continue to strain family budgets. And in communities across the country, the rapid expansion of data centers has transformed an issue once associated largely with technology policy into a local political fight over electricity, water and land.

Here are five issues shaping voters’ decisions.

1. Cost of living

For many Americans, the election begins with the household budget. Food, housing, gasoline, electricity and other everyday costs remain a source of frustration, giving Democrats an opening to argue that Republicans have failed to deliver the economic relief voters expected.

Republicans counter that Trump’s broader economic agenda will ultimately strengthen American industry and wages.

But the political challenge is immediate: voters experience the economy through what they pay every week, not through long-term projections.

Energy prices have become particularly important.

The war with Iran has contributed to pressure on fuel costs, while Trump’s tariffs have become part of the broader argument over whether his economic policies are protecting American workers or adding to the price of imported goods.

That makes affordability more than an economic issue.

It has become the lens through which many voters are judging the government itself.

2. Health care

Health care has returned as one of the most potent pocketbook issues of the campaign. Democratic candidates have focused heavily on insurance premiums, prescription costs and the broader expense of medical care, arguing that families are being squeezed by a system that remains too expensive.

Republicans point to Trump administration efforts to lower prescription drug prices and argue that greater competition and changes to federal health policy can reduce costs without expanding government control.

But the political argument is increasingly straightforward.

For voters worried about household finances, health care is not separate from the cost-of-living debate. It is part of it.

A monthly insurance premium or an expensive prescription can matter just as much to a family budget as the price of gasoline or groceries.

3. Immigration

Immigration remains one of Trump’s defining political issues. Republicans argue that the president has delivered on his promise to tighten the southern border, pointing to the sharp fall in illegal crossings since he returned to office.

For many Republican voters, that record represents one of the administration’s clearest accomplishments.

But the debate has shifted.

The question is no longer simply whether immigration enforcement should be tougher. It is increasingly about how far that enforcement should go.

The administration’s raids, deportations and broader crackdown have generated criticism from Democrats and concern among some independent voters who support stronger border controls but are uncomfortable with particular enforcement tactics.

4. The Iran war

The war with Iran has reached American voters through fuel prices, household costs and a broader debate over the price of U.S. military involvement overseas.

Critics argue that the conflict has become too costly and that its economic consequences are being felt by Americans who had little say in how the war developed.

Trump and his supporters have defended the decision to confront Iran, portraying it as a necessary demonstration of American strength and arguing that allowing Tehran greater freedom of action would ultimately have carried a higher price.

The political question is whether voters see the war primarily through the lens of national security or through the bill arriving at home.

For many, it may be both.

5. Data centers become a political issue

One of the more unexpected issues of the 2026 midterms is the growing backlash against data centers. The rapid expansion of artificial intelligence has created enormous demand for computing power, leading companies to pursue large data center projects across the country.

But communities hosting or considering those projects have increasingly raised questions about electricity consumption, water use, land development and pressure on local infrastructure.

The opposition does not fit neatly into traditional party lines.

Republicans and Democrats in affected communities have both pushed back against projects they believe could increase utility costs or place too much strain on local resources.

That makes data centers a revealing new political issue.

Washington may talk about artificial intelligence as a contest over technological dominance. Voters living next to the infrastructure that powers it may be asking a much simpler question:

What will it cost us?

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